- A143 between A1307 The Pightle and Ann Suckling Rd, Suffolk (Grid ref TL672460)
- A143 between Suffolk boundary and A1307, Suffolk (Grid ref TL678450)
- A143 between Ann Suckling Rd and B1061, Suffolk (Grid ref TL680468)
- A143 between A1017 and Essex boundary, Essex (Grid ref TL687444)
- A143 between B1061 and B1063 The Street, Suffolk (Grid ref TL700478)
- A143 between B1063 The Street and Glastonbury Rd, Suffolk (Grid ref TL801578)
- A143 between Glastonbury Rd and A1302, Suffolk (Grid ref TL845633)
- A143 between A1101 Out Northgate and A14 flyover, Suffolk (Grid ref TL856651)
- A143 between A14 and A134, Suffolk (Grid ref TL860661)
- A143 between A134 and A1088, Suffolk (Grid ref TL900674)
- A143 between A1088 S Ixworth and A1088 N Ixworth, Suffolk (Grid ref TL939705)
- A143 between A1088 N Ixworth and B1111 Stanton, Suffolk (Grid ref TL950719)
- A143 between B1111 Stanton and A140, Suffolk (Grid ref TM000741)
- A143 between A140 and Suffolk boundary, Suffolk (Grid ref TM146784)
- A143 between Norfolk boundary and B1134 Harleston south, Norfolk (Grid ref TM192790)
- A143 between B1134 Harleston and Norfolk boundary, Norfolk (Grid ref TM309880)
- A143 between Suffolk boundary and A144 Bungay, Suffolk (Grid ref TM331900)
- A143 between A144 Broad Street and Suffolk boundary, Suffolk (Grid ref TM334902)
- A143 between A144 Broad Street and Suffolk boundary, Suffolk (Grid ref TM334902)
- A143 between Norfolk boundary and A146, Norfolk (Grid ref TM351915)
- A143 between Norfolk boundary and A146, Norfolk (Grid ref TM359921)
- A143 between A146 and A146, Norfolk (Grid ref TM397929)
- A143 between A146 and B1074, Norfolk (Grid ref TM452989)
- A143 between B1074 and Green Lane, Norfolk (Grid ref TG490020)
- A143 between Green Lane and A12, Norfolk (Grid ref TG510041)
- A143 between A12(T) and B1370, Norfolk (Grid ref TG521050)